Machine for grinding.



PATENTBD OCT. 1'7, 1905.

W. s F. DOREY. MACHINE FOR GRINDING.

APPLICATION FILED JAN. 14, 1904.

2 SHEETS-SHEET 2` UNITED STATES PATENT orribili.

WILLIAM DOREY AND FRANK DOREY, OF GANANOQUE, CANADA, vASSIGrN- ORS TOTHE NATIONAL MICA AND GRINDING CO., LTD., OF GANAN- OQUE, CANADA, ACORPORATION OF ONTARIO.

MACHINE FOR GRINDING.

Specification of Letters Patent.

Patented Oct. 17, 1905.

Application filed January 14, 1904. Serial No. 189,037.

T0 tu whom it may concern:

Be it known that we, WILLIAM DOREY and FRANK DOREY, citizens of Canada,residing at Gananoque, in the county of Leeds, Province of Ontario,Canada, have invented certain new and useful Improvements in Machinesfor Grinding; and we do hereby declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

Our invention relates to machines for grinding mica and other minerals.

It has for its object to provide a machine of this nature which will bemuch simpler in construction, and therefore cheaper of manufacture, andin which a simple and efficient grinding process is used, which to thebest of our knowledge has not been known or used before our invention.

The invention consists, broadly, of a revoluble cylinder to which thematerial is fed by suitable means and in which are placed angular piecesor cuts of steel or other hard metal.

-The agitation of the cylinder causes the cuts to grind the mineral,which passes through suitable openings in the cylinder and is deliveredby suitable means to the outlet of the machine.

The'invention also consists of certain details of construction andcombination of parts hereinafter described, and more particularlypointed out in the claims.

In the accompanying drawings, illustrating the preferred embodiment ofour invention, Figure lis a side elevation of the machine with the outercasing removed and the cylinder and feeding mechanism in section. Fig. 2is a transverse sectional view of the machine on line .fr of Fig. 1,showing the casing; and Figs. 3 and i are side and plan views,respectively, of a modified form of feed mechanism.

Referring more particularly to the draw-v ings, 1 is the feed hopperleading to the feeder or worm-conveyer 2, which is mounted on a shaft 3,having one of its bearings in a bracket t, secured, as at 5, to one ofthe supports 6 of the machine. Said shaft carries a belt-pulley 7 foroperating the same and has its other end journaled in a-bearing-piece 8,fastened to the inner end of the sleeve 9, se-

cured, as at 10, to one end of the cylinder or shell 11. Said sleeve hasits other end mounted in the bracket 4 and bears upon a roller 12 on thesupport for the machine to which said bracket is secured. The cylinderor shell 11 is made, preferably, of sheet-steel and has its other endfixed to a short shaft 13, mounted in a suitable bearing and carrying abelt-pulley 14, whereby the cylinder is revolved. Said cylinder isperforated with holes, preferably one inch apart and three-sixteenths ofan inch in size, allowing the mineral as it is ground to drop on theordinary conveyer 15, which carries it to the outlet 16. Angular irons17, preferably about four inches wide, are secured firmly to the insideof the cylinder, and said cylinder is provided with a trapdoor 18,through which the cuts of steel may be passed.

In place of the worm-feed we may use the.plunger-and-pitmanmechanismshowninFigs. 3 and l. This mechanism isadapted more particularly for feeding large pieces of mineral Whichwould not pass through the firstdescribed mechanism. To attach thisdevice, the bracket 4: is removed and another bracket 19, carrying afeed-hopper 20, substituted therefor. Said bracket 19 has its tubularportion somewhat longer to allow for the movement of the plunger 21,which is carried by a pitman-rod 22 in two sections, one section 22 letin through the head of the tubular portion of the bracket-piece andsecured to a crosspiece 23, adapted to slide between parallel bars 24,and the other section also secured to said cross-piece and to a crank 24on a shaft 25, carrying a belt-pulley 26.

In use about one hundred pounds of, preferably, square cuts of steelfrom one to two inches square are placed in the cylinder for each footof its length. When the mineral is fed into the cylinder containingthese cuts and said cylinder revolved, it is obvious that said cutswillact upon the pieces of mineral, grinding them until they are line enoughto pass through the perforation in the cylinder.

It is obvious that other material besides minerals can be ground by ourprocess. It

is therefore understood that we do not limit ourselves to the details ofconstruction shown and described herein as the preferred con- IOOstruction of our invention, as they may be changed at will and thespirit of our invention remain intact and be protected.

Having thus described our invention, what we claim as new, and desire tosecure by Letters Patent, is-

1. In a grinding-machine, the combination with a revoluble vessel havinga tubular piece secured to one end thereof and extending well withinsaid vessel, said tubular piece mounted upon a roller-bearing, adetachable bracket secured to a support having a tubular portion of thesame bore as said tubular piece and carrying means, for feeding materialto the vessel, which extend through said tubular piece. A

Q. In a grinding-machine, the combination of a cylindric screen having ashort shaft lixed to the outer surface of one end of said screen andmounted in a bearing in a support., the central interior portion of saidscreen being uninterrupted, the other end of said screen having securedthereto a tubular piece resting upon a roller-bearing carried by asecond support, said tubular piece having its outer end engagingabracket removably attached to said second support, said bracket havingmeans interiorly thereof and extending through said tubular piece forfeeding material into the screen.

3. In a grinding-machine, the combination of a cylindric screen having ashort shaft fixed to the outer surface of one end of said screen andmounted in a bearing in a support, the central interior portion of thescreen being uninterrupted, the other end of said screen having securedthereto a tubular piece resting upon a roller-bearing carried by asecond support, said tubular piece having its outer end engaging arbracket attached to said second support, said bracket having means forfeed*- ing material into and through said tubular piece into the screen,said bracket detachably secured to said second support whereby saidbracket may be removed and another one substituted therefor.

In testimony whereof we afix our signatures in presence of twowitnesses.

WILLIAhM DOREY. FRANK DOREY.

mark

Witnesses:

W. F. STEVENS, C. H. WRIGHT.

